596  
FNCA52 TJSJ 150917  
FWFSJU  
 
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO  
NATIONAL WEATHER SERVICE SAN JUAN PR  
517 AM AST SAT AUG 15 2020  
   
DISCUSSION
 
ALTHOUGH RECENT KBDI CONTINUES WITHIN FIRE DANGER  
THRESHOLDS AT CAMP SANTIAGO, WITH A RECENT VALUE OF 587, THE  
EXPECTED WEATHER PATTERN WILL NOT SUPPORT FIRE WEATHER CONDITIONS.  
RELATIVELY DRIER AIR, ENCOMPASS WITHIN THE SOUTHERN PERIPHERY OF  
TROPICAL STORM JOSEPHINE, IS FORECAST TO MOVE IN DURING THE DAY,  
BUT WINDS ARE EXPECTED TO REMAIN BELOW 15 MPH WHILE FAVORING A  
GENERALLY EAST TO SOUTHEAST FLOW. THIS FLOW IS EXPECTED TO  
MAINTAIN RELATIVE HUMIDITY FAR FROM FIRE DANGER THRESHOLDS. IN  
CONTRAST, RELATIVE HUMIDITY MAY DROP TO OR NEAR FIRE DANGER  
THRESHOLDS AT CABO ROJO, BUT KBDI REMAIN WELL BELOW 200. AS A  
RESULT, A LOW FIRE DANGER RISK IS EXPECTED TODAY.  
 
PRZ014-160930-  
SOUTHEAST COASTAL PLAINS-  
517 AM AST SAT AUG 15 2020  
 
TODAY TONIGHT SUN  
 
CLOUD COVER PCLDY PCLDY PCLDY  
PRECIP TYPE SHOWERS SHOWERS TSTMS  
CHANCE PRECIP (%) 20 20 30  
TEMP (24H TREND) 89 (-1) 75 (-1) 87  
RH % (24H TREND) 57 (-3) 85 (-5) 64  
20FTWND-VAL/AM(MPH) E 10 E 5  
20FTWND-RDG/PM(MPH) SE 10 E 7 SE 7  
MIXING HGT(FT-AGL/MSL)5511 4631  
TRANSPORT WND (MPH) E 13 SE 6  
VENT RATE (KT-FT) 61647 22772  
DISPERSION 5 5  
DSI 6 2 5  
LAL 1 1 2  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ015-160930-  
SOUTHERN HILLS-  
517 AM AST SAT AUG 15 2020  
 
TODAY TONIGHT SUN  
 
CLOUD COVER PCLDY PCLDY PCLDY  
PRECIP TYPE SHOWERS SHOWERS TSTMS  
CHANCE PRECIP (%) 20 10 40  
TEMP (24H TREND) 88 (+1) 73 (0) 89  
RH % (24H TREND) 54 (-8) 88 (-8) 55  
20FTWND-VAL/AM(MPH) E 9 SE 5  
20FTWND-RDG/PM(MPH) SE 9 E 5 SE 7  
MIXING HGT(FT-AGL/MSL)5951 5345  
TRANSPORT WND (MPH) E 13 SE 6  
VENT RATE (KT-FT) 64802 25941  
DISPERSION 5 5  
DSI 5 2 5  
LAL 1 1 2  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ016-160930-  
NORTH COASTAL PLAINS-  
517 AM AST SAT AUG 15 2020  
 
TODAY TONIGHT SUN  
 
CLOUD COVER PCLDY PCLDY PCLDY  
PRECIP TYPE SHOWERS TSTMS TSTMS  
CHANCE PRECIP (%) 30 30 60  
TEMP (24H TREND) 88 (0) 77 (-1) 90  
RH % (24H TREND) 60 (-5) 84 (-8) 59  
20FTWND-VAL/AM(MPH) E 10 LGT/VAR  
20FTWND-RDG/PM(MPH) E 12 E 9 G17 E 6  
MIXING HGT(FT-AGL/MSL)5189 4828  
TRANSPORT WND (MPH) E 14 E 3  
VENT RATE (KT-FT) 55693 18258  
DISPERSION 5 5  
DSI 6 4 5  
LAL 1 2 2  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ017-160930-  
NORTHERN HILLS-  
517 AM AST SAT AUG 15 2020  
 
TODAY TONIGHT SUN  
 
CLOUD COVER PCLDY PCLDY PCLDY  
PRECIP TYPE SHOWERS SHOWERS TSTMS  
CHANCE PRECIP (%) 30 10 70  
TEMP (24H TREND) 89 (+2) 74 (+1) 90  
RH % (24H TREND) 53 (-12) 86 (-13) 54  
20FTWND-VAL/AM(MPH) E 8 LGT/VAR  
20FTWND-RDG/PM(MPH) NE 10 E 7 NE 5  
MIXING HGT(FT-AGL/MSL)6444 5735  
TRANSPORT WND (MPH) E 12 SE 3  
VENT RATE (KT-FT) 57870 19915  
DISPERSION 5 5  
DSI 5 3 5  
LAL 1 1 2  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ018-160930-  
WEST COAST-  
517 AM AST SAT AUG 15 2020  
 
TODAY TONIGHT SUN  
 
CLOUD COVER PCLDY MCLEAR PCLDY  
PRECIP TYPE SHOWERS SHOWERS TSTMS  
CHANCE PRECIP (%) 40 10 40  
TEMP (24H TREND) 87 (-3) 77 (0) 89  
RH % (24H TREND) 59 (0) 86 (-1) 58  
20FTWND-VAL/AM(MPH) E 7 SE 5  
20FTWND-RDG/PM(MPH) E 7 LGT/VAR SE 6  
MIXING HGT(FT-AGL/MSL)5216 4766  
TRANSPORT WND (MPH) E 8 SE 3  
VENT RATE (KT-FT) 57056 25442  
DISPERSION 5 5  
DSI 5 2 4  
LAL 1 1 2  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ019-160930-  
EASTERN INTERIOR-  
517 AM AST SAT AUG 15 2020  
 
TODAY TONIGHT SUN  
 
CLOUD COVER PCLDY PCLDY PCLDY  
PRECIP TYPE SHOWERS SHOWERS TSTMS  
CHANCE PRECIP (%) 30 30 40  
TEMP (24H TREND) 90 (+2) 74 (-1) 89  
RH % (24H TREND) 54 (-9) 91 (-5) 55  
20FTWND-VAL/AM(MPH) E 9 LGT/VAR  
20FTWND-RDG/PM(MPH) E 9 E 6 SE 7  
MIXING HGT(FT-AGL/MSL)6285 5585  
TRANSPORT WND (MPH) E 12 SE 6  
VENT RATE (KT-FT) 57589 25807  
DISPERSION 5 5  
DSI 6 2 5  
LAL 1 2 2  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ022-160930-  
LUQUILLO MOUNTAIN RANGE-  
517 AM AST SAT AUG 15 2020  
 
TODAY TONIGHT SUN  
 
CLOUD COVER PCLDY PCLDY PCLDY  
PRECIP TYPE SHOWERS TSTMS SHOWERS  
CHANCE PRECIP (%) 30 50 30  
TEMP (24H TREND) 86 (+2) 71 (-2) 86  
RH % (24H TREND) 61 (-8) 94 (-2) 63  
20FTWND-VAL/AM(MPH) E 9 LGT/VAR  
20FTWND-RDG/PM(MPH) E 9 E 6 SE 8  
MIXING HGT(FT-AGL/MSL)4670 4557  
TRANSPORT WND (MPH) E 10 SE 6  
VENT RATE (KT-FT) 41093 22020  
DISPERSION 5 5  
DSI 6 2 5  
LAL 1 2 2  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ023-160930-  
CENTRAL MOUNTAIN RANGE-  
517 AM AST SAT AUG 15 2020  
 
TODAY TONIGHT SUN  
 
CLOUD COVER PCLDY PCLDY PCLDY  
PRECIP TYPE SHOWERS SHOWERS TSTMS  
CHANCE PRECIP (%) 40 10 60  
TEMP (24H TREND) 88 (+4) 72 (+1) 91  
RH % (24H TREND) 48 (-18) 87 (-11) 49  
20FTWND-VAL/AM(MPH) E 8 LGT/VAR  
20FTWND-RDG/PM(MPH) E 7 LGT/VAR SE 5  
MIXING HGT(FT-AGL/MSL)6726 5989  
TRANSPORT WND (MPH) E 9 SE 5  
VENT RATE (KT-FT) 64810 25701  
DISPERSION 5 5  
DSI 5 1 4  
LAL 1 1 2  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ024-160930-  
CAYEY MOUNTAIN RANGE-  
517 AM AST SAT AUG 15 2020  
 
TODAY TONIGHT SUN  
 
CLOUD COVER PCLDY PCLDY PCLDY  
PRECIP TYPE SHOWERS SHOWERS TSTMS  
CHANCE PRECIP (%) 30 20 40  
TEMP (24H TREND) 87 (+2) 73 (0) 85  
RH % (24H TREND) 58 (-5) 91 (-7) 61  
20FTWND-VAL/AM(MPH) E 10 SE 5  
20FTWND-RDG/PM(MPH) E 9 E 6 SE 7  
MIXING HGT(FT-AGL/MSL)5612 5063  
TRANSPORT WND (MPH) E 13 SE 6  
VENT RATE (KT-FT) 58559 25466  
DISPERSION 5 5  
DSI 6 2 5  
LAL 1 1 2  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ025-160930-  
VIEQUES-  
517 AM AST SAT AUG 15 2020  
 
TODAY TONIGHT SUN  
 
CLOUD COVER PCLDY PCLDY PCLDY  
PRECIP TYPE SHOWERS TSTMS SHOWERS  
CHANCE PRECIP (%) 40 40 30  
TEMP (24H TREND) 90 (0) 79 (-3) 86  
RH % (24H TREND) 60 (-1) 85 (+6) 66  
20FTWND-VAL/AM(MPH) E 10 SE 6  
20FTWND-RDG/PM(MPH) E 9 E 9 SE 8  
MIXING HGT(FT-AGL/MSL)3034 2836  
TRANSPORT WND (MPH) E 13 SE 8  
VENT RATE (KT-FT) 32427 19778  
DISPERSION 5 5  
DSI 6 5 6  
LAL 1 2 1  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ026-160930-  
CULEBRA-  
517 AM AST SAT AUG 15 2020  
 
TODAY TONIGHT SUN  
 
CLOUD COVER PCLDY PCLDY PCLDY  
PRECIP TYPE SHOWERS TSTMS SHOWERS  
CHANCE PRECIP (%) 40 50 40  
TEMP (24H TREND) 90 (0) 81 (-1) 87  
RH % (24H TREND) 59 (-2) 83 (+1) 63  
20FTWND-VAL/AM(MPH) E 12 SE 7  
20FTWND-RDG/PM(MPH) E 9 E 10 SE 9  
MIXING HGT(FT-AGL/MSL)3120 2837  
TRANSPORT WND (MPH) E 18 SE 8  
VENT RATE (KT-FT) 47860 20014  
DISPERSION 5 5  
DSI 6 5 6  
LAL 1 2 1  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
PRZ027-160930-  
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-  
517 AM AST SAT AUG 15 2020  
 
TODAY TONIGHT SUN  
 
CLOUD COVER PCLDY PCLDY MCLEAR  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 20 20 20  
TEMP (24H TREND) 88 (-3) 75 (-2) 88  
RH % (24H TREND) 55 (-1) 87 (+1) 58  
20FTWND-VAL/AM(MPH) E 10 E 7  
20FTWND-RDG/PM(MPH) SE 10 G17 E 5 SE 9  
MIXING HGT(FT-AGL/MSL)5522 4879  
TRANSPORT WND (MPH) E 14 SE 6  
VENT RATE (KT-FT) 60587 25927  
DISPERSION 5 5  
DSI 5 2 5  
LAL 1 1 2  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
VIZ001-160930-  
SAINT THOMAS AND SAINT JOHN-  
517 AM AST SAT AUG 15 2020  
 
TODAY TONIGHT SUN  
 
CLOUD COVER PCLDY PCLDY PCLDY  
PRECIP TYPE SHOWERS TSTMS SHOWERS  
CHANCE PRECIP (%) 40 50 40  
TEMP (24H TREND) 91 (+1) 79 (+1) 89  
RH % (24H TREND) 58 (-6) 82 (-9) 62  
20FTWND-VAL/AM(MPH) E 11 SE 8  
20FTWND-RDG/PM(MPH) E 9 E 10 SE 9  
MIXING HGT(FT-AGL/MSL)2988 3278  
TRANSPORT WND (MPH) E 17 SE 10  
VENT RATE (KT-FT) 45342 30515  
DISPERSION 5 5  
DSI 6 5 6  
LAL 1 2 1  
HAINES INDEX 3 3 3  
 
REMARKS...NONE.  
 

 
 
VIZ002-160930-  
ST CROIX-  
517 AM AST SAT AUG 15 2020  
 
TODAY TONIGHT SUN  
 
CLOUD COVER PCLDY PCLDY MCLEAR  
PRECIP TYPE SHOWERS SHOWERS SHOWERS  
CHANCE PRECIP (%) 30 20 10  
TEMP (24H TREND) 91 (-1) 76 (-1) 90  
RH % (24H TREND) 57 (-2) 90 (-1) 58  
20FTWND-VAL/AM(MPH) E 10 SE 7  
20FTWND-RDG/PM(MPH) E 9 E 8 SE 9  
MIXING HGT(FT-AGL/MSL)3982 4279  
TRANSPORT WND (MPH) E 12 SE 8  
VENT RATE (KT-FT) 36535 25048  
DISPERSION 5 5  
DSI 6 4 6  
LAL 1 1 1  
HAINES INDEX 3 3 4  
 
REMARKS...NONE.  
 

 
 

 
 
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